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HelpTest Code VB12 Vitamin B12
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | 3 days |
| Refrigerate: | 7 days |
| Frozen: | 3 months |
Reference Interval
| Age | |
|---|---|
| 5 days -< 1yr | 191-1,163 pmol/L |
| 1 - 8 yrs | 209-1,190 pmol/L |
| 9 - 13 yrs | 186-830 pmol/L |
| 14 - 16 yrs | 180-655 pmol/L |
| 17 - 18 yrs | 150-599 pmol/L |
| ≥19 yrs | 138-652 pmol/L |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31732
Update
Last updated 16/05/2024
Updated on Methodology.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of pernicious anaemia. Increased levels are seen in hepatic cell damage and myeloid leukemia.